Super killer influenza, when? how? need prevention
Normally in the influenza virus, because it has a segmented genome, new variants
are created by re-assortment and not by recombination," said Dr. Erich Hoffmann,
scientific manager at St. Jude Children's Research Hospital in Memphis, Tennessee.
Hoffman is part of a team that has identified a gene involved in the
transformation of the influenza virus. The National Institutes of Health is using
the discovery to develop next season's flu vaccine.
If the virus takes on a human gene, the immune system might recognize the
infection and mount an immune response. But with recombination, he said, the virus
evolves to contain a gene that is part avian and part human. That would allow it
to both infect humans and retain its high mortality rate. Niman calls it "elegant
evolution."
"Some of the recombination is by trial and error, but (the virus is) also
trying things that have worked in the past," he said. "It happens all the time --
I have a paper showing that's how the 1918 pandemic strain was formed. The avian flu that has led to the death of more than 100 million birds and at
least 42 humans -- about three-quarters of those infected -- is known as H5N1. It
contains eight genes, and the fear is that it will reassemble, swapping one of its
bird-infecting genes for a human-infecting gene. Scientists predict that could be
the beginning of a pandemic that could kill millions of people, rivaling the 1918
epidemic that killed 40 million people.***** When it is going to happen? soon. wtih evidence of new type of avian flu,
which showed that mutation occured.
Is it possible that migrating birds spread the virus? Yes, very very likely.
During spring time, birds migrating birds shifted to Korea and other northern
places. Korea experienced farm poultry loss recently. Half a year ago, thiland
then followed by Vietnam suffered farm poultry loss. The action plan should be carried out. Preserved wildlife sanctury in
national parks. All visitors should clean up properly to avoid spreading any virus
to farm poultry, ducks and other birds. Leave the wild birds alone. Scientists
have confirmed that human has invaded into the area of wetlands, birds parks and
disturbed the ecology balance. For example, forest fire created by estate farmers
force fruit bats of Borneo to shift to trees near pig farm and spread the deadly
Nipah ( similar to Hantar virus) to human. Many friends died during that episode
in West Malaysia.
file S215
0 Comments:
Post a Comment
<< Home